Figure 5.

Evolution of populations with three shapes × three colors × eight orientations. (C1) shapes are tested in separate populations containing a single shape each, data shown for triangle (i.e., participants are asked to select the preferred triangle from 24 color-orientation combinations). (C2) all three shapes are tested in mixed population containing all shapes (i.e., participants select the preferred color-shape combination of a given shape presented at any one of eight orientations in the presence of both other shapes, combined with the same set of colors and orientations: 72 color-shape-orientation combinations). The panels on the left side shows for triangles the development of color proportions of red, yellow, and blue individuals (shown as stacked bars), averaged for all orientations, in an evolutionary run, displayed for generations 1, 2, 4, 6, 8, and 10 (abscissa). The panels on the right side show the proportions of red, yellow, and blue individuals in the final (10th) generation in an evolutionary run, for each of eight stimulus orientations (abscissa). Averages from n = 3 participants.